From: Phlip <phlipcpp@...>
Date: 2006-12-12T15:00:06+09:00
Subject: Non-useless mode for YAML::Syck::Map.children_with_index?

Rubistas:

Here's a complete working sample illustrating the issue in YAML::Syck, or 
its documentation:

    require 'yaml'

    y = YAML.parse("i: b\na: sequence")
    p y.kind # <-- :seq

    y.children_with_index.each do |me_nil, me_key|
      p me_nil # <-- nil
      p me_key # <-- a Scalar
      p me_key.value # <-- i, a
      p y[me_key] # <-- nil
      y.value[me_key]  #  <-- the real child object!
    end

The general goal is very simple: To walk the object model, all the way from 
the root :seq down to a leaf Scalar, without ever stepping out of Syck 
objects, into Hash or Array objects. The reason is because they might have 
different features, so I might lose some Syck abilities. This might just be 
impossible, so I need to know that before committing to any one strategy.

Incidentally, the existing implementation solves the primary mismatch 
between the OMap object (which I also cannot figure out how to grab 
directly) and the Hash, whose keys are in an undefined sequence. The 
children_with_index returns the indices in the correct order, so the last 
line y.value[key] can then get the children in the right order.

But yet children_with_index doesn't return the children...

-- 
  Phlip
  http://www.greencheese.us/ZeekLand <-- NOT a blog!!!